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把大涡模拟应用于复杂几何形状的流域是一个重要研究课题。对１８０°方形弯管中的湍流流动作大涡模拟，以网格节点为中心的交错网格作为离散网格，用有限体积方法和中心差分进行空间离散，用Ａｄａｍｓ－Ｂａｓｈｆｏｒｔｈ格式进行时间离散，用简单的Ｓｍａｇｏｒｉｎｓｋｙ模型来作为次网格湍流模型。用多重网格方法求解压力方程以提高计算效率。数值模拟结果与实验结果取得了很好的一致。
The application of large eddy simulation to the basin of complex geometry is an important research topic. Large-eddy simulation of turbulent flow in a 180 ° square elbow was carried out. The staggered grids centered on the grid nodes were used as discrete grids. The finite volume method and central difference were used for spatial discretization. The time dispersions were performed by the Adams-Bashforth scheme. Use a simple Smagorinsky model as a sub-grid turbulence model. Solve the pressure equation by multiple grid methods to improve computational efficiency. The numerical simulation results are in good agreement with the experimental results.